From nobody Thu Mar 26 04:27:53 2026 X-Original-To: freebsd-security@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fh9k16sq5z6W3N3 for ; Thu, 26 Mar 2026 04:27:53 +0000 (UTC) (envelope-from security-advisories@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2610:1c1:1:6074::16:84]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "freefall.freebsd.org", Issuer "R12" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fh9k14lp5z3nXf; Thu, 26 Mar 2026 04:27:53 +0000 (UTC) (envelope-from security-advisories@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1774499273; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=whKzx+DUnMiNN6X7430Vkj4D8V0cEZ+G5nLbggsEaAo=; b=cQXrFjJlNthESDfudtCLJNOKZGomYgYEbjeU8oVSx4rVrOYKjNHgD9VgksBOrFWrXYVEcz UEv+R9SwgeERGiGnpGpxz1blC6tyB2p9ntFgjRsoeaZSZxWjB1t4JWDfLKOqLt2IUIVXSE 0W6DP2RAE8pp9O9NI/9AKDApI8ntN+/vVW2dbxIZp+Rvbp9GeqBOSJFrta7QZOzeu0b/hD Nb0sLdXKOPJ1lL8y6zvl+KwYZHq52Orgqn3GTxXv/+064R8GmlqzcMbekueyvTNVDecP6B Z6bWfgar/AA7xzzTh3B68MAD+1+hw4KSORmfZEQx7Q5LuzXq/y2cqR8rUZaF4w== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1774499273; a=rsa-sha256; cv=none; b=OUun62BYHI7H7GgbA75UBv7z0rg8jNyMJjkpjGOlh6Bygm8F+gW0zfdNThGmk5WFXlJc6K lfuaO/v96tAC3qFCkMY5hKuM1fwvDfHRElTZic3A8NiKnVA73HkWwuVPIBdKXfzl2quIpR zdofWBWRjyv9tLKujHnLqoQxA3KmyIYle5Mr7/4YUu0mzy7vCsuuzzImfUQcg53aNQJb45 5hFsBD+J8eioxmKXEkg+ZQnnwoW+p95JNZB0tZoMwmG6auW3je1KzlWoLbzFEUVT0JmSqR IyyIPZTlc0Q7QBczqnTkHpaA+RpmBnt7zZ9jqtKxmAYTFaqFQm3sQMYzRxuTbw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1774499273; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=whKzx+DUnMiNN6X7430Vkj4D8V0cEZ+G5nLbggsEaAo=; b=Y0UCRyk0HqCWPNyOF7YWg9Afrq776P6L3O5iIGraRbmyUj8bg39ATodapKAleS3oD7QA4T Oe58xiixa4nV8M3ZMdOBMYSNV+oM61dJr7OGIsWcXxnxzC23cdicJY1YdauR/wAK0swE3C QRDdJI8eF1neGZrKegWZbhakAWA09QJKE7yJXugDymQoXkpC309XAY84UkZZd/Dt2WE2WQ Pf1QZZu1xJ5VqQXSbIKkpTsYO95E/JF/1WESG4uFWIuzgK6uLVDb8dGM+D/Hy4cNLtTvKI jDadOB5U2bDtjm35CQp02/IpKgXn/r7laKStfz9Yf28wN3adhvSqnThTbQ4gRw== Received: by freefall.freebsd.org (Postfix, from userid 945) id 607941508; Thu, 26 Mar 2026 04:27:53 +0000 (UTC) From: FreeBSD Security Advisories To: FreeBSD Security Advisories Subject: FreeBSD Security Advisory FreeBSD-SA-26:07.nvmf Reply-To: freebsd-security@freebsd.org Precedence: bulk Message-Id: <20260326042753.607941508@freefall.freebsd.org> Date: Thu, 26 Mar 2026 04:27:53 +0000 (UTC) List-Id: Security issues List-Archive: https://lists.freebsd.org/archives/freebsd-security List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-security@freebsd.org Sender: owner-freebsd-security@FreeBSD.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:07.nvmf Security Advisory The FreeBSD Project Topic: Remote denial of service via null pointer dereference Category: core Module: nvmf Announced: 2026-03-26 Credits: Nikolay Denev Affects: FreeBSD 15.0 Corrected: 2026-03-25 01:29:47 UTC (stable/15, 15.0-STABLE) 2026-03-26 01:11:19 UTC (releng/15.0, 15.0-RELEASE-p5) CVE Name: CVE-2026-4652 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background The nvmf driver implements the kernel component of an NVMe over Fabrics host. The CONNECT command is used to create connections (queue pairs) that carry NVMe read/write commands over the network. For I/O queues, this is commonly referred to as an I/O CONNECT. II. Problem Description On a system exposing an NVMe/TCP target, a remote client can trigger a kernel panic by sending a CONNECT command for an I/O queue with a bogus or stale CNTLID. III. Impact An attacker with network access to the NVMe/TCP target can trigger an unauthenticated Denial of Service condition on the affected machine. IV. Workaround No workaround is available. V. Solution Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date and reboot. Perform one of the following: 1) To update your vulnerable system installed from base system packages: Systems running a 15.0-RELEASE version of FreeBSD on the amd64 or arm64 platforms, which were installed using base system packages, can be updated via the pkg(8) utility: # pkg upgrade -r FreeBSD-base # shutdown -r +10min "Rebooting for a security update" 2) To update your vulnerable system installed from binary distribution sets: Systems running a RELEASE version of FreeBSD on the amd64 or arm64 platforms, which were not installed using base system packages, can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install # shutdown -r +10min "Rebooting for a security update" 3) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch https://security.FreeBSD.org/patches/SA-26:07/nvmf.patch # fetch https://security.FreeBSD.org/patches/SA-26:07/nvmf.patch.asc # gpg --verify nvmf.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile your kernel as described in and reboot the system. VI. Correction details This issue is corrected as of the corresponding Git commit hash in the following stable and release branches: Branch/path Hash Revision - ------------------------------------------------------------------------- stable/15/ b1d32521747f stable/15-n282694 releng/15.0/ 48766013063a releng/15.0-n281012 - ------------------------------------------------------------------------- Run the following command to see which files were modified by a particular commit: # git show --stat Or visit the following URL, replacing NNNNNN with the hash: To determine the commit count in a working tree (for comparison against nNNNNNN in the table above), run: # git rev-list --count --first-parent HEAD VII. References The latest revision of this advisory is available at -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEthUnfoEIffdcgYM7bljekB8AGu8FAmnEkV4ACgkQbljekB8A Gu/KVBAA0QPwISRLuInGilUGPkO0fjXD5teeufdqHOABQJB+YgvelArfgd0odN4S b7OXiDIdUsJsJF5CDFm5FVkAuQe0PnhakuXnxEMrDxpNu+H9zFBWrmCVtflWRay3 APB3EGqxghhez/pNx+8M/Tf//QZjOmZSsu2C3om7mfv5jGetjRY/3jLkWiMx7ASu lVFYue+PRSKf0jl0fjsxjvJMosTtgmM6xkB2cpDF+z6HKK6rtt0YUhw+/v0plLxa jBQNIT3MCJ8OJU75LB5K/84iF3c/PTFupZQIMenejPt1FfC55CDKmta88LGUPxRn u67tyidS+C7BLMnOn3mlgx3Vst1NxLc5to7KVYr1S3V17na5jglnnE3Av2lE/CMJ v9UT7IsLG5AsHusY1iYvkiReLfJgeouOlSJkQoiVfJYuT5G0ERdC+Sp3G9X0q8sp 2Q/YA0+qt0Fqdc8hn25Qus1pvWSvg+RBUuDDLsWsC9FbUbyjBNB2Og34dmW46t38 EWoCFHZ0u/PRPZ7YnwpIE6xx6mDOc7XcVtK9fFc6VKjtiP7sDk42W5O2wyAKBcRl oTZl56h/g+Kutmnvj1vHAcntX4IbTfXw7S5SVnzPBVD2W6yOKas5R1GBK9O2S4IE CU69VbcPD51vJY/mY8w6oefZXLoxHE2WH0eAwz3/NJaFRwtqT1k= =l61h -----END PGP SIGNATURE-----